N,N-Dimethylglycine → 3,3-Dimethyl-2-(3-methyl-5-morpholin-4-yl-phenyl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

HRID 2045303Notes

Reaction equation

HRID 2045303 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:21]=[C:20]([CH3:22])[CH:19]=[C:18](Br)[CH:17]=1)[C:10]([CH3:25])([CH3:24])[CH2:9]2)=[O:5])[CH3:2].[NH:26]1[CH2:31][CH2:30][O:29][CH2:28][CH2:27]1.CN(C)CC(O)=O.C(=O)([O-])[O-].[K+].[K+]>CS(C)=O.[Cu]I.C(OCC)(=O)C>[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:17]=[C:18]([N:26]3[CH2:31][CH2:30][O:29][CH2:28][CH2:27]3)[CH:19]=[C:20]([CH3:22])[CH:21]=1)[C:10]([CH3:25])([CH3:24])[CH2:9]2)=[O:5])[CH3:2]

Participants

8

Reactant 4

HCID 673N,N-DimethylglycineHCID 8083MorpholineHCID 11430Potassium CarbonateHCID 674415422-(3-Bromo-5-methyl-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

Product 1

HCID 674425853,3-Dimethyl-2-(3-methyl-5-morpholin-4-yl-phenyl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl esterYield 51%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 679Dimethyl SulfoxideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of 2-(3-bromo-5-methyl-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (1.0 g, 2.5 mmol), morpholine (2.2 g, 25 mmol), copper (I) iodide (0.29 g, 1.5 mmol), N,N-dimethylglycine (0.28 g, 2.0 mmol) and potassium carbonate (1.04 g, 7.5 mmol) in DMSO (6 mL) was heated for 4 hours at 120° C. After cooling to room temperature, the mixture was treated with ethyl acetate (50 mL) and washed with water (20 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated in vacuo. Purification on flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company)(20% ethyl acetate/hexanes) to afford 3,3-dimethyl-2-(3-methyl-5-morpholin-4-yl-phenyl)-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (0.52 g, 51%) as a white solid: LC/MS m/e calcd for C25H32N2O3 (M+H)+: 409.6, observed: 409.2.

Workup

  1. temperatureAfter cooling to room temperature
  2. washwashed with water (20 mL)
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customPurification on flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company)(20% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-f2087b4e15b2406ab7d64ca7e4728e78
Source dataset
uspto-grants-2013_11
Patent number
US08586747B2

Reaction notes

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